tza3031ahl NXP Semiconductors, tza3031ahl Datasheet - Page 6

• Manufacturer Part Number: tza3031ahl
• Description: Sdh/sonet Stm1/oc3 Laser Drivers
• Manufacturer: NXP Semiconductors

Philips Semiconductors
FUNCTIONAL DESCRIPTION
The TZA3031AHL, TZA3031BHL and TZA3031U laser
drivers accept a 155 Mbits/s STM1 Non-Return to Zero
(NRZ) input data stream, and generate an output signal
with sufficient current to drive a solid state Fabry Perot
(FP) or Distributed FeedBack (DFB) laser. They also
contain dual loop control circuitry for stabilizing the true
laser optical power levels representing logic 1 and logic 0.
2002 Aug 13
handbook, full pagewidth
handbook, full pagewidth
SDH/SONET STM1/OC3 laser drivers
DIN, DLOOP
V CC(G)
TZERO
MONIN
TONE
BGAP
GND
GND
GND
Fig.5 DIN/DINQ and DLOOP/DLOOPQ inputs.
1
2
3
4
5
6
7
8
Fig.4 Pin configuration of TZA3031BHL.
100
10 k
TZA3031BHL
GND
6
The input buffers present a high impedance to the data
stream on the differential inputs (pins DIN and DINQ);
see Fig.5. The input signal can be at a CML level of
approximately 200 mV (p-p) below the supply voltage, or
at a PECL level up to 800 mV (p-p). The inputs can be
configured to accept CML signals by connecting pins DIN
and DINQ to V
If PECL compatibility is required, the usual Thevenin
termination can be applied.
MGS910
10 k
TZA3031AHL; TZA3031BHL;
100
V CC(R)
CC(R)
24
23
22
21
20
19
18
17
MBK845
via external 50
DINQ, DLOOPQ
GND
ZERO
ONE
V CC(R)
DLOOPQ
DLOOP
V CC(R)
GND
Product specification
pull-up resistors.
TZA3031U